mirror of
https://github.com/Ysurac/openmptcprouter.git
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51 lines
1.5 KiB
Diff
51 lines
1.5 KiB
Diff
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From 01e8a38985a90043abddc5c5bcd049c74bb29a53 Mon Sep 17 00:00:00 2001
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From: Peter Geis <pgwipeout@gmail.com>
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Date: Sun, 19 Dec 2021 18:52:18 -0500
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Subject: [PATCH 05/11] rockchip: rk356x: HACK: fix sdmmc support
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HACK: lock mmc0 to initial frequency and disable dw-mmc control of power
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line.
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The sdmmc on quartz64-a is powered by the sdmmc0 power line, which is
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active low.
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Even though it is set as a gpio, it still seems to be triggered by the
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dw-mmc driver toggling the power line.
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Downstream fixes this by setting this to "0" instead of "1" using
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kconfigs.
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Also, for some reason the controller will only operate at initial
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frequencies.
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Signed-off-by: Peter Geis <pgwipeout@gmail.com>
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---
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arch/arm/dts/rk3566-quartz64-a-u-boot.dtsi | 4 +++-
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drivers/mmc/dw_mmc.c | 3 ++-
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2 files changed, 5 insertions(+), 2 deletions(-)
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--- a/arch/arm/dts/rk3566-quartz64-a-u-boot.dtsi
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+++ b/arch/arm/dts/rk3566-quartz64-a-u-boot.dtsi
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@@ -13,8 +13,10 @@
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};
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&sdmmc0 {
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+ max-frequency = <400000>;
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+ bus-width = <4>;
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u-boot,dm-spl;
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- status = "okay";
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+ u-boot,spl-fifo-mode;
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};
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&uart2 {
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--- a/drivers/mmc/dw_mmc.c
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+++ b/drivers/mmc/dw_mmc.c
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@@ -529,7 +529,8 @@ static int dwmci_init(struct mmc *mmc)
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if (host->board_init)
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host->board_init(host);
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- dwmci_writel(host, DWMCI_PWREN, 1);
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+// dwmci_writel(host, DWMCI_PWREN, 1);
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+ dwmci_writel(host, DWMCI_PWREN, 0);
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if (!dwmci_wait_reset(host, DWMCI_RESET_ALL)) {
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debug("%s[%d] Fail-reset!!\n", __func__, __LINE__);
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